Improvement in saw-filing machine



` ,PETERS. PHOTO-LITMDGRAPHER, WASHINGTON D c g.. annasara @anni 4 (attire.

j GEORGE ROBINSON AGN'D'HAEVEY O. SILVER, OE sODUs, NEW Yon f. f y` Letteajs Ptefnt'lio; 90,125, dated 184, 1869.

y vIMIEROA'YEMEN'T IN'` SAW-FILING MACHINE.

The Schedule referred to in these Lettera Patent and making part of the same.

To all wliomit may concern: i

Be it known thatwe, GEORGE ROBINSON and HAE- vEY O, SILVER, of Sodus, in the countyof NVayue,

and State of New York, have invented a new and usefnl Improvement in Saw-Filing Apparatus;` and we `do hereby declare .that the following is a full, clear,

r p and exact description thereof', which will enable-those skilled in the art to make and usethe same, refer-V ence being had to the accompanying drawings, forming part of this specification, inl which- Figureil is a frontview, and Figure 2 is a sectional sideview.

l p `Similar letters of reference indicate` like parts. j

This invention relates to an improved apparatus for holding the le, in filing large saws, wherein the vtile `is suspended in a pair of swinging stirrups, and is `held `against its work bymeans of a weight and cords passing over a suspending roller; and I The'invention consists in combining withsaid appliaucesa pair of clamping-jaws, for securing the saw,

and in a novel and convenient method of adjusting the stilrups on the ends of the suspending-cords, as hereinafterl more fully explained. f

In the accompanying drawingsj Theluprights A A support a roller, B, from .which depend two cords, b b, (Figure 1,) for suspending the le-stirrups G O.

`The lower end of each suspending-oord terminates ,in a rod, c, which passes through a guidein the upper p part of its st'irrup, and terminates in a hook, thesaid hook engaging with one of a series of holes in Athe shank of the stirrup, (see shank, provided with a series of holes, at C, Figure 2,) thus affording a ready means for changing the angle of the le. i f In the centre of the frame-work is a pair of vertical clamping-jaws, DD, for holding the saw.

F is a weight, which, by means of cord f and pulley i, connects with roller B, and tends to turn said roller,

`so that the file is pressed upward against the teeth'of the s aw.

Its operation is'as` follows: Y llhe sawA is clamped in the vjaws D D by driving in the keys,-or wedges c e, fig. Land the iile is thensuspended in the stirrups C, at an angle slightly inclined f from the horizontal, as shown, by adjusting the hooked is then reversed, and the teeth, having a diierent set, are filed with a bevel opposite to the first.

Heretofore, the angle ofthe le could not be varied from the horizontal without much inconvenience, but in this manner its angle is readily controlled, so as to give thebest cutting-edges to the teeth, and to also give the iile clearance on the return-stroke, by which the` files Vare `not worn out so rapidly. r Circular saws can also be suspended in this apparatusby a mandrel, so as to be rotated and clamped ast-he work progresses. y By these means the apparatus is made more eiiicient and convenient than heretofore.

We do not claim suspending the stirrups, which shown in thc patent granted to John Shelicld, dated "June 6, 1854, for saw-filing apparatus; but having thus described our invention,

What we claim as new, and desire to secure by LettersBatent, is Y l. 'ihe adjustable two-part stirrups C c, O c, cony structed as described, and suspended from the weighted roller B, for altering the inclination ofthe ile, as and -for the purpose set forth.

2. The saw-liling apparatus, composed of the vertical clamps D D and keys e @,for holding the saw, and the two-part adjustable stirrups' C c suspended from the weighted roller,I B; for supporting the file in diierent positions and at various inclinations, al1 constructed substantially as described, and arranged within a suitable frame, to operate as set forth.

GEORGE ROBINSON. HARVEY O. SILVER. Witnesses `O'. 0.1TEALL, G y AMBLIss CHESTER. 

